tests/suites/test_suite_test_helpers.function

/* BEGIN_HEADER */

/* Test some parts of the test framework. */

#include <test/helpers.h>
#include <test/memory.h>

/* END_HEADER */

/* BEGIN_DEPENDENCIES */

/* END_DEPENDENCIES */

/* BEGIN_CASE depends_on:MBEDTLS_TEST_MEMORY_CAN_POISON */
/* Test that poison+unpoison leaves the memory accessible. */
/* We can't test that poisoning makes the memory inaccessible:
 * there's no sane way to catch an Asan/Valgrind complaint.
 * That negative testing is done in programs/test/metatest.c. */
void memory_poison_unpoison(int align, int size)
{
    unsigned char *buf = NULL;
    const size_t buffer_size = align + size;
    TEST_CALLOC(buf, buffer_size);

    for (size_t i = 0; i < buffer_size; i++) {
        buf[i] = (unsigned char) (i & 0xff);
    }

    const unsigned char *start = buf == NULL ? NULL : buf + align;
    mbedtls_test_memory_poison(start, (size_t) size);
    mbedtls_test_memory_unpoison(start, (size_t) size);

    for (size_t i = 0; i < buffer_size; i++) {
        TEST_EQUAL(buf[i], (unsigned char) (i & 0xff));
    }

exit:
    mbedtls_free(buf);
}
/* END_CASE */